docs(en): merge website/master into cn.eslint.org/main @ bda0561d

[docschina-bot]

此 PR 自动生成。

合并 eslint/website 的修改至本仓库（@ bda0561）

以下文件存在冲突，可能需要重新翻译：

• _pages/index.liquid
• docs/developer-guide/contributing/changes.md
• docs/developer-guide/contributing/index.md
• docs/developer-guide/contributing/new-rules.md
• docs/developer-guide/index.md
• docs/developer-guide/unit-tests.md
• docs/user-guide/getting-started.md
• docs/user-guide/index.md
• docs/user-guide/integrations.md
• package.json

请解决所有冲突后提交到此 pull request，可直接在 Github 修改、切换到 sync-bda0561d 分支进行修改或者使用 Github Desktop 拉取此 pr 修改并提交。

禁止使用 Squash Merge 来合并此 Pull Request！

使用该操作会导致上游仓库的内容丢失，并致使下一次合并产生冲突。

[eslint-github-bot]

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